The slits in a Young’s double slit experiment have equal widths and the source is placed symmetrically relative to the slits. The intensity at the central fringes is I 0 . If one of the slits is closed, the intensity at this point will be
A
I 0
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
By using 
{where I = Intensity of each wave}
At central position φ φ = 0 0 , hence initially I 0 = 4 I .
If one slit is closed, no interference takes place so intensity at the same location will be I only i.e. intensity become s 
or 
.
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